Hydrometallurgical production of zinc oxide from roasted...

Details Hydrometallurgical production of zinc oxide from roasted... Hydrometallurgical production of zinc oxide from roasted...

C - Chemistry, Metallurgy

01

G

C01G 9/02 (2006.01)

Patent

CA 2072714

ABSTRACT OF THE DISCLOSURE A process is provided for obtaining high quality high surface area zinc oxide from a roasted zinc sulphide concentrate by leaching with an ammoniacal ammonium carbonate solution. The process utilizes optional preliminary oxidation and water leaching steps to remove soluble impurities and an optional aqueous sulphur dioxide leaching step to selectively remove readily soluble zinc oxide. The process includes an improved source of roasted zinc sulphide concentrate. The process also includes an optional reduced pressure calcining step to produce zinc oxide with further increased surface area.

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